Inquiries of SNT-TC-1A

Qualification and certification of NDT personnel, based on some standardized approach that is recognized and agreed to buyers and sellers of NDT-releated inspections, is widely practiced throughout industry. Recommended Practice No. SNT-TC-1A: Personnel Qualification and Certification in Nondestructive Testing Was the first document widely used for this purpose.
Another document initially issued by ASNT in 1991, reissued in 1995, 2001, 2006, 2011 and 2016, is ANSI/ASNT CP-189: Standard for Qualification and Certification of Nondestructive Testing Personnel. This document differs from SNT-TC-1A in that is an ANSI Standard and contains clearly defined minimum requirements that must be satisfied in their entirety.

Inquiry:
In paragraph 1.1, of SNT-TC-1A refers to individuals who "perform, witness, monitor or evaluate nondestructive tests. Is it intended that individuals whose principal functions are to witness, monitor or evaluate nondestructive tests be qualified in the same manner as those whose principal function is to perform nondestructive test?

Response:
Is intended that the employer designate through the written practice as recommended in Paragraph 5 specific jobs that require knowledge of the technical principles of nondestructive testing. The employer should test the statement of paragraph 1.1 ".... personnel whose specific jobs require appropriate knowledge of the technical principles underlying the nondestructive tests they perform, witness, monitor or evaluate," against the specific job elements of the personnel in question in order to establish whether or not the specific jobs requires knowledge of nondestructive testing